Truck GPS solution with reliably available/attainable maps?

[vassock]

What the title says. Need an affordable GPS solution that has the option for truck-specific avoidances (parkways for example). More importantly it should be something compatible with freely-attainable maps (updated ones, USA). Those Chinese no-brand GPS units on eBay are fairly affordable and come with iGo Primo, but they have issues with unsufficient memory and error popups. Any ideas?

I saw this on eBay:
[Only registered and activated users can see links. ]

RoadMates (even big ones like that) can sometimes be had for good prices since their map update features don't work. I have a different roadmate and am using it with iGo. Was wondering if that particular unit was compatible (I do see an SD card slot). Then I can get a microSD and load it with iGo and northeast maps. I believe iGo has truck options.

[Only registered and activated users can see links. ] - seems like a better deal and not too small. I'll have to ask him if it has a microSD slot, though. It does. Saw it on images of a different unit with same model #.