Lorri, If you are willing to take the time to learn and to use TMG then go for it.
The next version of TMG is to be called 5.0 and it is to be a 32bit program, (Win95/98) controls. It must be still in the early stages of work and no release date has been issued.
Since you are not a UFT user then you should expect to pay $99 for version 4.0 or 4.0a. Registered users have been offered a better price for a upgrade later. Some genealogy type stores may give a better price.
Slowness of TMG may have been more about the larger size of information you can enter. Or there is some lag in changing screens. But that would be a CPU - vidio thing.