Wrong forum, but if heavy is what you're after steer clear of a cab like this. I would recommend a 2x12 Recto Cab or some other 12in speaker configuration. Jensen's are great but will be a bit more midrangy than most 12s. Check Craigslist in your area. I see 2x12 Mesa cabs going for < $300 a lot. Remember when it comes to speakers old isn't always bad, speakers take a while to break in. Good luck.
-Castro