what type of AEG was it?
If you're thinking of 'upgrading' from AEG to AEP pistol, it couldn't have been too brilliant.
AEP pistols are fine as a last ditch backup when it's too cold for gas pistols. But as a primary weapon? It'll be outranged and outshot by almost everything on the field. So unless you're really sneaky... I'd go along for a few skirmishes and when you have your UKARA membership sorted get yourself something nice and shiny.
Pretty much any AEG is good, go for body shape and play style.
MP5's are great allrounders but the mags are a little small, if your using hicaps.
M14's can be really good in terms of accuracy, but can be a little long if your a shortie.
M4's Generic, but have an amazing amount of upgradees and body kits. From cqb stubbies to Monster Sniper DSM's.
AK's with big mags awesome first weapons, But don't press the magic button..

Really just what you prefer.