Go to range and try some rentals...
I'm not a fan of 40cal so I'd skip those
Glock 30 or 30s are amazing, Glock 21 full size goodness
G30 standard 9 and 10 rd mags, they will also accept G21 full size mags
I own both, compact or full size
if I could only own one would be the G30 or 30s model the 30s is a hair thinner I believe
I'd also suggest you try some S&W M&Ps in 45cal