Ta brón orm - níl mo Ghaeilge go maith... ach is fearr Gaeilge bhriste, ná Béarla cliste ;-)

Could you help me with two things?

First, how do you say 'Best wishes' in Gaelic? I want it for the front of a card. Is it:
Le gach dea-ghuí
?

And secondly, with my Gaeilge bhriste I can't check the 'correctness' of more complex or lengthy phrases or structures, so I would be keen to hear what you think of the two tranlsations of the famous Irish blessing below.

May the road rise to meet you.
May the wind be always at your back.
May the sun shine warm upon your face,
the rain fall soft upon your fields.
And until we meet again,
may God hold you in the palm of his hand.

Go n-éirí an bóthar leat.
Go raibh an chóir ghaoithe i gcónaí leat.
Go dtaitní an ghrian go bog bláth ar do chlár éadain,
go gcuire an bháisteach go bog mín ar do ghoirt.
Agus go gcasfar le chéile sinn arís,
go gcoinní Dia i mbosa a láimhe thú.

Go n-éirí an bóthar leat
Go raibh an ghaoth go brách ag do chúl
Go lonraí an ghrian go te ar d'aghaidh
Go dtite an bháisteach go mín ar do pháirceanna
Agus go mbuailimid le chéile arís,
Go gcoinní Dia i mbos A láimhe thú.

Go n-éirí an bóthar leat
Go raibh an ghaoth go brách ag do chúl
Go lonraí an ghrian go te ar d'aghaidh
Go dtite an bháisteach go mín ar do pháirceanna
Agus go mbuailimid le chéile arís,
Go gcoinní Dia i mbos A láimhe thú.

Is the one I'm more familiar with, and I can only speculate that the reason is that it is preferred by more people. As for the nuances of translantion poetic and prosaic, you'll have to wait to hear from the experts.