yea, check out all of them, and take a long time doing it. don't worry about brand, worry about sound. take a cymbal you already have that you want to keep playing along with whatever new ones you buy, and compare new ones in the store to it to make sure they compliment each other.
if you're playing harder/louder/heavier music, i'd avoid any crashes smaller than 17 inches. also, splashes are kinda going to be a waste unless you're going to be playing with a kit that always is going to have microphones on it. no one will hear them otherwise, especially in a loud setting, and you'll inevitably end up hitting them harder and harder trying to get more volume out of them, and just end up breaking them. i'd also avoid chinas that are smaller than 18 inches, the exception being Zildjian's Oriental China Trash in 16. any other 16 inch china i've ever played didn't endure, and i don't hit particularly hard, or with poor technique. can't go wrong with 18 inch chinas, in any type of music. 20 inch chinas are cool, but just too hard to control, the exception being Paiste's Twenty series 20 inch. that's just awesome. or if you can find one of their Signature Dark Energy chinas in 20 inches....they're discontinued, but they're still out there.
for your ride cymbal, are you going to be solely playing it with the tip of the stick on the body and the shank of the stick on the bell, or are you going to be crashing on it too? what sort of metal are you playing? are we talking Brutus, Fleshcrawl, and Blood Red Throne type metal? or are we talking Winds Of Plague/Despised Icon breakdown metalcore?
if you want a nice heavy ride with a good articulate body sound and a nice, piercing bell, Zildjian's K Custom Dry ride. it only comes in 20 inches, and sounds great. As do Sabian's AAX Raw Bell Dry Ride, Sabian's HH Raw Bell Dry Ride, Sabian's Vault Definition Ride, Zildjian's A Custom Rezo Ride, and Zildjian's Z3 Rock Ride, Paiste's Signature Dark Metal Ride, Signature Dry Heavy Ride or Signature Reflector Bell Ride, 2002 Power or Heavy rides, or Rude Power ride. All sound great and would work in many types of music. However, they're not suitable for crashing....they're too heavy, and you'd end up breaking them fairly quickly due to their lack of flexibility.
if you want a ride to crash on, in addition to their body and bell sounds, Sabian's Vault Encore ride, Paiste's Rude Crash/Ride, Zildjian's Sweet Ride or K Crash/ride. these are all designed to flex, and are somewhat thinner weight cymbals.
for hihats, you've got to figure out what you'll be playing more often than not. if your hats are going to be kept half open at all time, and you'll be rarely playing them with your foot, then go for something heavy that'll give you insane volume. Zildjian's Z3 Dyno Beat would be a great option for that. however, they're only going to be used for metal or punk, something where subtlety or nuance isn't required. If you need something that has the capability to be versatile, then go for a hihat set that has a thicker cymbal on the bottom, and a somewhat lighter cymbal on top. Zildjian's K/Z combo or any Mastersoud models, Sabian's AAX Fusion or Xcelerator hihats, or Paiste's Twenty or 2002 Heavy Hihats or Rude Sound Edge hihats would all be good options.
don't rush into anything, and don't worry about making sure they all match, brand or series wise. take time to find the best sound for you and the way you play. if you're going to drop upwards of $1300 on four cymbals, you'd better be happy with them, and happy with playing them, for years.