Proto Matrix Rail (PMR) is the best buy IMO at the moment and i have been told it is also coming down in price,
http://www.protopaintball.com/europe/Rail/features.html
this is the info on a PMR. at the moment they are £152 but i think they are going down in price.
I guarantee once you buy one you will not regret the buy, as long as you maintain it properly and make sure you take good care of the bolt then you will be fine. The bolt needs lubing lots as it has so many orings so after everyuse but thats it.
I brought one and wanted to buy a new gun like an ego 06 but i cant bring my self to sell my PMR. Its quiet, quick, and a great shooter. If you buy the Eos thats a lot of money and i woul recommend an ego 06 rather than the eos. if you buy the PMR you have an extra hundred pound for more stuff
hope i have helped
-MJ