if you dont' mind the opinion of former maxum owner...
i bought a 3700 back in 98 (new) and found it to be a very well built, well designed boat. never had to call maxum or the dealer in the 6 years i kept it (700 hours), just routine maintenance.
back then, the "sport yacht" line included the 3700, 4100 (express, bridge or aft cabin and the 4600). the 4600 is one nice boat and a great value. They were all built more or less to the same standard, different from the smaller maxums (up to the 33)
i carefully compared the 3700 to other boats when i bought it, incl SR, and despite its reasonable price, it had a lot of things others didnt' have, including SS trhuhull instead of plastic, a realbow pulpit, wide sidedecks, shore power in a stern locker, corian not formica, etc... the rub rail for instance was thru bolted... i never got a single drop of water leaking anywhere in that boat... and we get some pretty heavy rain showers in so fl. the engine bay was a pleasure to work in. plenty of room between the engines, decent access outboard, easy to reach generator, belts, etc... dont' recall the ER on the 46 but i'm sure it's pretty good too.
one exmaple of well built the boat was came during a strong tropical storm around 2000 or 2001, in a narrow slip, i couldnt keep the boat off the piling and after high tide, it ended up sort of hanging by the rail on top of a piling. the rail was deformed upward almost 6 inches, but the stanchions based never cracked, not even spider crack in the gel coat and i never even got a leak!
check out the review on www.yachtsurvey.com ... he rarely praises production boats, yet has mostly good things to say about the 4600. you can also check out www.maxumowners.com, some good info there.
if i had not needed something bigger to live aboard, the 4600 woudl have been my next boat.