The monster 900/750 is more of the "grocery getter"/Hooligan bike of the lineup but an excellent bike. Problem is when you compare them to the other Ducati's, even a superb bike would fall short. For the same price as a newer monster, you can get a 748 or 96 a few years old... ...and be into a serious bike.
Now I'd always pick the Porsche over the Ducati, but I'm fortunate to have both in my stable. If you end up buying the bike instead or the p-car, go for the Superbike line... it's worth it.
They have actually been very reliable except for alternator/voltage regulator issues.