If you look here under "remote controls" :
http://www.pioneer.e...1/overview.html
you can see that f.i. the CD-RV1 should work ( http://www.pioneer.e...-RV1/specs.html )
If you have a HD3, you're at least one map update behind, because the latest map update also transforms your HD3 into a HD3-II
I don't exactly know what the current version is, but you can at least see the version number under "settings", "hardware" (see manual page 83)
Last software update (which also transforms the HD3 into HD3-II ) was in 2010. There have been no further map updates since then, however, according to rumours there should be a new update out around September, so if you want to update you would be wise to wait till then......
You can usually find a new harddisk with updated software on ebay 
see for example http://www.ebay.co.u...=item35be6c97a0
I think it also displays the version (date) on startup of the system...