I'm in the market for a small greenhouse, probably 6' x 8' or smaller. I'm not looking for a "serious" greenhouse, but would love to have a few extra months of growing time and somwhere to putter around. The greenhouse will have to also serve as a small storage area (lawnmower, gardening tools, etc.). I have my eye on these two greenhouses and wonder if someone could help me weigh the pluses and minuses.

I like the Rion because it's plastic and seems easy to put together (my husband would be thrilled with that part). I like the look of it too. I'll have to buy or build a base for this one (another $150 or so for the prefab base). That will put it near the top end of my budget...

http://www.ourcrazydeals.com/m_19.asp?pro=19&c=9

This aluminum greenhouse is much more affordable, but I worry that means I'll be sacrificing quality. Will it warp or be impossible to put together?? We have a Harbor Freight Sales in town, does anyone know if they usually carry them in the store?

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=47712

I definitely don't need a professional caliber greenhouse, but our winters (Wisconsin) can be tough so it has to be somewhat durable. I don't expect to have plants in it year-round (although eventually that'd be great), but I'd like to be able to leave it in place. Regarding quality, I'd rather spend a little more now and have something that will last, but it probably has to be under $1000. I think redwood greenhouses are beautiful, but out of range. And for whatever reason I really want something like a polycarbonate greenhouse, not one with flexible sheeting.

Thanks very much!

Kris