G45 then?
There are so many threads / posts about the Gen 5 and it's advantages. I'm not really qualified (I only have a G19.5 and a G26.5) to recommend anything over anything else but I've been really satisfied how mine have worked out since I sold both HKs (VP9/P30SK). I have a GSSF coupon burning a hole in my pocket and I'm danged if I can't think of anything other than another G19.5 to buy (I have size M hands to the G19 fits me like a G17 fits guys with bigger hands).