Ryan
You haven't mentioed what spec machine you're looking for or what your budget is.
If you are looking for a high end porty, then it's down to the likes of the Alltec X3, Ninja, Scorpion and the Cleansmart types of triple vac machines. The weight and spec issues of these have been well debated here.
If however, you're not looking at this end of the market, a compact machine I really like is the Alltec Aqua 40. A good solid all round twin vac machine with in tank heater that punches a little above it's weight. And it's very compact too. Not sure about current pump options. Some will say that the tanks are too small at 4 buckets a fill, but in reality, that's no problem. If a given job requires, say, 9 buckets of water, instead of filling a machine twice, you may fill it 3 times, and when you do, it should be during your pre-sprays dwell time so no time lost. I'm not sure about the weight of this machine, but it should be easier to handle than some physically larger models.
The Prochem range is attractive too, but I'm not familiar with their weight and bulk. Certainly amongst the best built on the market.
Safe and happy cleaning

The Ken