My personal opinion. A Kraken. but don't buy from the retailer. your prety much going to be playing the lottery. some work, some blow after 100 bb's, some need repairs out of the box.
so if you going to buy a kraken get it from somone here on the board.
The ressons for a kraken for a first timer is its a good starter build (360ish fps out of the box). plus you can upgrade it/ alot of after market parts.
so after about $1000 you could have 3-5 different layouts of the gun itself.
Kraken(The Africa Gun)