If it was just a weekend (and I'm assuming this also means non winter) car....I'd rather have the convertible. Unless the Mustange was an auto....then It's definatly the SVT.
My Cars
1999 Silver Frost SVT - 80,000km #2603/2760 Aug. 10, 1999.
1996 Mercury Mystique LS V6 MTX - retired @ 323,151km.
1995 Ford Contour V6 MTX-sold @ 214,000km