If you are looking for a VST ROMpler synth, a good alternative might be the AIR Xpand!2 synth.
"Air Music Technology originally created Xpand! as part of the Creative Collection of instrument plug-ins included as part of Avid™ Pro Tools™. With the release of Pro Tools 8, this widely popular workstation was given new controls, improved features, an additional Gigabyte of sounds, and a new name: Xpand!2. As the popularity of Pro Tools grew, more and more musicians and producers came to rely on the incredible sonic firepower of this amazing workstation. Xpand!2 continued to evolve, and demand grew. Finally, Xpand!2 is now available on its own, available to anyone who hungers for the finest sounds instantly." It has a good collection of realistic sounds with 2500+ presets and parts, and is 4 part multitimbral, so you can create quick layers and combis. I'm sure that you could find a much better sounding patch in here to replace your Groovesynth parts with!
It is listing for $69 now at most online retailers, but occasionally goes on sale for less.
Here is a link to one source, and a trial version is available:
http://www.pluginboutique...nstrument/1560-Xpand-2