nativetan,
the cosmolux vhr tt and the 9k90 are excellent replacements for your vhr's. the vhrtt is about 10% stronger and you see almost instant results although it's more reddining. the 9k90 is more of a bronzing lamp with more uva. both of these
lamps kick butt.
a good choice for replacing your bellariums are the beach sun by light source.
greg