I need advice on buying and managing a BT phone. I now have the CPW 3510i &
Samsung C100 Voda & T-mobile FT750 deals so I should be OK for airtime for a
while and I basically want a phone that has good battery life and that I can
manage more efficiently than all the others I've ever owned.

By that I mean every time I change phones I have to manually re-enter all
the contacts and numbers, luckily there aren't that many but even so a more
efficient system is needed (once had a Psion and Ericsson that made the
process so easy!) I assume that there must be a phone and software that I
could use to sync via BT?  Advice appreciated on the software and hardware
needed (which I think is a USB BT dongle thingy?  Is eBay a reliable source
as there seems to be lots of them offered?).

Because of the multiple contracts I need a BT phone that will accept at
least a dual SIM holder.  Are some dual SIMs better than others?  I would
like to avoid the SIM cutting I've seen in some eBay ads if possible.  Are
"ghost" dual SIM holders a good alternative?

I saw John's post about getting a "free" 6310i and but for the timing I'd
have gone for that - I assume that would have done what's needed?  However
if that's not available what else should I go for?  The T610/Z600 seems to
be well rated here, is that a possible?

BT Headset
I've seen the Jabra BT200 advertised for ~£40 and have one on order at
Amazon in the vain hope it turns up before another standard replaces it.
Is it OK or should I look to buy another instead?  The BT250 is almost 2x
the price is it really 2x as good?  Plantronics M3000 for ~£45, etc..

So what do you recommend / where should I get it / where can I get it for
free, or as near to free as possible ;-)

Thanks and a happy New Year to all.