Another vote for the Piglet. I've messed with a couple of other highbankers that use older style hoppers, perforated spray bars, expanded w/ miners' moss, hungarian riffles, drop riffles, etc. Most modifications I've tried to make to my others are already incorporated into the Piglet, so I said screw it and bought one. It's a simple, efficient, robust unit. They are welded instead of riveted now and the whole thing, with mats, only weighs 20-21lbs. At $490, it's also cheaper than most others and seems to run well over a yard per hour, but leaves less concentrates and only takes about one minute to clean out. The old version of GH's Mini, the Excavator) was lower quality and not as efficient.
The Honda WX15 pump ($500!) is more appropriate than the WX10. The Piglet likes 3000-4000 GPH. It's still only 20lbs, though. Piglet + Honda pump = $1,000. You can save around $300 and get a cheap Chinese pump if you like.
The smallest Proline is $2,000, which includes a high-pressure Honda pump that allows you to dredge. Proline also makes very high quality equipment and you should look into it before you pull the trigger on either unit.
Definitely go out with someone who has some experience first, if you're able.