Pistols are as much about the look as they are function from what I gather... Also, do you shoot more using your left hand? I'm a lefty and have found on a lot of pistols (glocks, 1911 and barrata especially) the mag release is in just the "right" place for my finger to accidentally press it...
I don't have a lot of experience with pistols, but for what it is worth I love my WE Little bird as the blow back feels awesome on it. However it is not very gas efficient... I picked mine up for £90 brand new. Came with two mags and various sizes of back straps. The WE Big Bird is around the same price, but doesn't come with the smaller mag (which means you don't need a spacer when using the full sized mags). Can also be picked up for around £100 I think.
My TM MK23 is just new (costs more than your £100 guide though), but I love it for being sneaky and using the pistol at longer ranges than normal cqb.
Best bet is to go visit a large airsoft shop and pick up as many kinds as you can. See what feels comfortable to you. Or ask around at a game day.