Juwel are generally regarded as one of the best, and easiest to set up, but if you buy from a reputable dealer, then you should have no problems. Rena and Hagen are also very good tanks.
Tanks are tanks as far as I'm concerned. I usually go for the likes of clearseal (econ brand in UK) and treat my fish to a larger tank for the same money.
I'm very pleased with my 'hagen/fluval' all in kit (hagen stand, hagen tank, glo-light duo hood, glo-light lights*2, fluval plus4filter, hagen tronic heater, 5* plastic plants, hagen aquasafe & cycle, food). I got a 180litre kit for £209 from petsAtHome- but you can probably find it cheaper on ebay!