You can use the Windows Mail program from VISTA if you want to or don't like Windows live mail. Remember its older and won't be supported but I did post AGES ago on this forum how to do it so just search.
I'm happy with Outlook 2007 - Ooutlook 2003 and 2007 are much improved over the first version of Outlook included with office XP (Outlook 2002).
You can also download various email clients like that included with firefox etc -- your choice.
NOTE however that you might need a copy of windows XP to get Windows Mail stuff into Outlook -- you need by some quirk of design to import them into OUTLOOK EXPRESS and then you can import into OUTLOOK.
Cac handed I know but that's the only way I could get it to work from Windows Mail into Outlook.