In budget, GP (plus a lot of unsolicited advice)
I own GP (4" and 6"), Ruger SP, 1911 (Colt, Randall, AMT) as well as Colt Trooper, and Ruger Security Six (in various barrel lengths)
It's prudent to stay within budget. Tell your wife-partner (obviously you have an admirable marriage where you both communicate-congratulations) that you want both, but will go for the affordable GP and want to budget for the 1911 to come later.
Not a carry gun? Go for the 6". The .357 Magnum was designed for a longer barrel. Sure, with modern powders, you can optimize loadings for shorter barrels, but you are always giving something up. Sight radius, of course. Velocity (refer to the web site "Ballistics by the inch", Google it.) and then you get more flash and blast, too.
Trigger not smooth? Get a copy of the IBOK (Iowegan's Book of Knowledge) and study it. Decide if you want to pay a gunsmith or attempt the job yourself. It's not that hard. (Though I have not done one myself, I have smoothed my triggers the old-fashioned way-shooting.)
If you don't reload, consider it. Budget $200-$250 for a decent (economy) press and (minimal, but premium) accessory gear (2 or 3 manuals, powder scale, dies etc.) It is the only way I have been able to shoot enough to get those triggers smooth. I don't dry fire my guns as a habit.
For target work, get the gold dot/v-notch sights on that GP. I love mine.
Lost Sheep
Caveats:
Remember, only believe half of what you see and one quarter of what you hear. That goes double for what you get from the internet. Even this post.
Do your own independent, confirming research when ANYONE gives you new facts on the web.
Also remember, even the idiotic stuff might have a kernel of truth buried in there somewhere.
disclaimer: I do not know you, so if my advice seems over-obvious, take into account my ignorance of your experience level. Also, other readers of all experience levels are reading.