Look you can go pretty "beefy" without spending hundreds of dollars, and it would be my personal advice and well, honestly you should find out some of your preferences before saying money is no object. Money IS object, because if you buy a 1K mod you HATE, you will not be pleased with the outcome.
And best is also totally subjective so if you want "beefier" coming from a very small, MTL vape then you should really try some medium priced mods to see what you like, some different tanks (drop ins and RTAs or RDAs or whatever you want, etc.) to figure out what your preferences actually ARE.
Some folks adore TC and go down the TC trail, some folks are happier with wattage, some folks prefer drop in coils in ALL sorts of resistances, some folks prefer squonking there is just an endless set of options to explore.
You are not going to find your "best" vape at all probably on your first try, so like, make it a less expensive try.
I mean I once saw a pic of a cheap, ego pen style battery encrusted in diamonds and gems and I think the price tag was into the 20Ks and I would not call that a "good vape" for example.
Just... try some stuff. Don't blow out your wallet, and as you zero in on your preferences THAT is the time to splurge.
For example I own two kabuki tanks, and both of them were over $100 by a fair margin.
I love them, but I started with a Nautlius 2, like every other (well many vapers) person before me and I made good and sure that I was a dyed in the wool MTL vaper before I made that purchase. It's also a purchase I do not regret at all, because I waited until the time was right, etc.
Anna