FreeBSD on SSD on ASUS P5KPL-C

[Snow Mountains]

Hello,

I'm about to upgrade hardware on my desktop and to install FreeBSD 9
on it. I have ASUS P5KPL-C and want to buy a SSD or SATA-III 6Gb/s
drive for it.

Please advise me:

* does it make sense to buy SSD drive for a mb that supports 4x SATA
3Gb/s (of couse, expecting a possible future mb upgrade)?

* if SSD is capable of working at greater speed, will it simply
operate on maximum 3Gb/s on P5KPL-C?

* the same question for SATA-III 6Gb/s. Will it simply operate on 3Gb on my mb?

* How will FreeBSD 9 behave in such situations? Any special tweaking needed?

Thank you very much for your explanations,

Sergi M.