I have two laney GS212ie's and, yes, the speakers are not great (nor are they too terrible either).
But, considering that the cab only costs £190 in the first place, you can get a pretty well made cab and buy the exact set of speakers you want for £300.
You'd probably be able to sell the 70/80's that came in it on ebay too, to make back some more money.
For me, the great things about the GS212ie is that it's pretty light, the handles are superb and that together makes it a very portable 2x12 - not something the Orange 2x12 (for example) can be accused of !
The cab also has a depth of almost 14", which gives it a bigger, fuller sound than most (usually considerably shallower) 2x12 cabs. They even make greenbacks sound deep and full !
The tolexing and general fit and finish on the Laney cabs is not the best around, but where it matters in the woodwork, they are very solid and, of course, completely plywood constructed.