Well, my opinion should be obvious to anyone that's seen my NGD posts of late - I've bought 2 this month. Never have I felt such a strong urge to own multiples of the same guitar, and the price made it a no-brainer to grab a second, in case it should go up in the future. It's by far the most versatile guitar I've ever played - there's just a stunning array of tones available out of one guitar.
Neck concerns are valid - if you don't like a neck, you don't like a neck. I love the thin T-60 neck now that I'm used to it.
As for heavy, both of mine are under 9 pounds.
Brak, I do think you got one thing inaccurate in the first post - the painted ones are Poplar, not Alder, according to the good folks at the T-60 forum. Never had a Poplar axe before, but my Black T-60 sounds mighty fine...
I have an old issue of Peavey Monitor From spring 1987. It has the T-60 and T-40 in the catalog, but only in black, like another famous "T". It identifies the body material as western maple. I'm not sure when they made the change from poplar to maple but it must have been late in the production run.