The Buttkicker is a good starting place but the amp will only offer a mono or single channel of amplification. So in future you cannot achieve say stereo tactile or add additional tactile units. You would have to buy another full package.
Here is an example:
Say you ended up wanting 2x or 4x tactile units
BK Gamers in UK/Europe are more expensive than USA.
£160 x 2 = £320 or x4 = £640
Compare this to buying a decent 2 Channel amp.
Even a good but budget 4ohm model like this (friend has one)
http://www.thomann.de/gb/the_tamp_e400.htm
This amplifer and dual Reckhorn wouldnt cost much more than a Buttkicker Gamer package but give dual tactile units.
The difficulty for budgeting is finding stereo or multichannel amplifiers at a reasonable price point that offer the 4 ohm rating. Many will be closer to £200 each but these IMO would be much better than the BK Gamer amplifer. Also being STEREO they will support dual shakers.
You could then consider tactile like the Reckhorn or Clarke TST T209 which would likely be much better than the first one you linked.
In the long term going this route allows for upgrading, can save you money and possibly give a better performance. Really depends on what suits your needs and budget.
