For that size go with glass, custom made rather than an expensive off-the-shelf unit. Dimensions, bigger is better but if you stick to 60cm high you should be aright with 10mm glass and save some money, if anything go wider, eels, plecs, cichlids, knife fish and loaches are all going to benefit more from a big footprint than a tall tank.
for me, I'd go 180x75x60cm, 10mm glass, filtered with a sump running filter socks and submerged media, and set up with a herbie-style overflow so it is nice and quiet.