Having used an Eagle Rhodesian Recon Vest (a modular chest rig), the issued TV, the old issued LBV, and the old 82 Pattern Webbing, I have this to say to anyone interested in getting a chest rig: A Tactical Tailor 2 Piece MAV looks to me like a very sensible choice.
The Eagle RRV was awsome, except for the fact that it didn't open in the front (doing up the side releases behind the armpits is a *****) and the bib was totally unnecessary. There is no doubt about it, modular is the way to go.
The guys wearing Warlords looked way too overloaded. Maybe RCR Grunt will post that pic of himself (you know the one I'm talking about) where he's all decked out.
A 2 Piece Mav though, is very flexible. It can be worn high like a chest rig for mounted ops, or as PhilB said:
a lot of guys bought split front MAV's and had them riding very low on the hips. This type of set up is not ideal for vehicles but distributes the weight much better for patrolling.
It also has 4 rows and 20 channels of MOLLE (22, if you include a center adaptor) which is enough room to mount more gear then you could carry. I wouldn't suggest loading a MAV to it's capacity, but the flexibility is there. As well, I own a number of TT pouches and while the quality isn't as good as Eagle, it's not bad and IMHO a decent value.
Just my .02. If I could do it again, I'd go for a 2 Piece MAV.