I just started 'collecting' last week. My current 'arsenal' is:
XP:
Super Soaker XP 240
Okay for a smaller blaster, it feels durable but because some parts are glued it is hard to repair when it would ever break. Not all water of the pressurized reservoir can be used.
Super Soaker XP 310
Just repaired! A small tube was cracked, this seems to be the weak point. The good thing is that it has no glued parts so I could easily open it. I always liked the larger air pressure guns, and this is no exception. The gun has a nice selection of smaller and medium nozzles. The small ones preserve water and the medium ones are a nice compromise between output and endurance. The gun is comfortable to handle and has a powerful pump which quickly repressurizes its dual pressure chambers.
Pro's: Great all-purpose gun, see-through reservoir, nozzle selections, easily opened for maintenance, good pump.
Cons: Fragile power meter, tube to power meter prone to breaking or leaking.
CPS:
Super Soaker CPS 1700
The CPS1700 is a very powerful blaster as is expected from a CPS weapon. It is quite big but it comes with a strap to easily carry it. I never used a CPS before so I was amazed by its performance and water output. It can completely soak anybody within a second. CPS technology allows you to shoot in any direction without shooting air. The pump is well-designed and can move a lot of water into the pressure chamber but the nozzles are not so well designed. There are only two of them and both are very big. The pressure chamber is emptied very quickly which makes this not a good gun for trigger happy people.
Pro's: Powerful, big water output, great colouring, well-designed pump, comfortable to use and carry.
Cons: Bad selection of nozzles. It should also include a smaller nozzle to preserve water. nozzle selector appears to be glued on, which makes this gun very hard to open.
Soakinating the countryside...