APC vs Liebert

[BillP]

Hello
I'm looking for some direction / advise
We currently have or should say had a GXT2-10000RT208 which I bought in 7-12-06 they say the power modual is bad of course we are out of warrenty and a new power modual is almost the same cost of new.
GXT2-10000RT208 to replace is around $6400.00 and is not in stock 7-10 bussiness days before shipment.
APC SURT10000RMXLT6U is around $5400.00 can ship out 1-2 days

Are we compairing apples to apples?
Is the wait really worth it?
What unit woud you buy?

The use of the unit is powering 20 engineering work stations for all my designers.

The liebert worked fine but I would have thought the life of the unit would be more than 4 years. understanding that I would need to replace batteries. Which I did about 6 months