I opted for the hw100 after much debate and looking/trying guns.
I looked at the AA ultimate sporter, Daystate huntsman regal and the AA S510.

Like others say, get out and try a few, it was only by doing this that I realised the hw100 was for me and it has been a great gun over the past year. I have managed to shoot 3 50's now and regularly hit high 40's. I know the gun is good for all targets but I let her down!
If it helps, I got the full length sporter.