Windows Vista - 32bit or 64bit?

Hey all, can not decide between the two, mainly because I have heard about compatibility issues with 64bit and some of the programs used by many on this site. I use my PC mainly for video encoding and dvd burning. I already have the cpu and mobo -
http://www.amdcompare.com/us-en/desktop/details.aspx?opn=ADX6000IAA6CZ

Here are my most commonly used programs. Have any of you had problems with them and 64bit Vista (or even 32bit Vista for that matter)? This will help me decide between 32bit and 64bit Vista. Thanks!

AdAware2007_v7.0.2.5
AnyDVD_v6.3.0.6beta
AviSynth_v2.5.7
Canopus Procoder 3 (may be purchasing)
Cinema Craft Encoder Basic (not used lately)
Cinema Craft Encoder SP (used often)
Cinema Craft Encoder SP2 (may soon be purchasing)
CloneCD_v5.3.1.0
CloneDVD_v2.9.1.2
CloneDVDMobile_v1.1.6.0
CrapCleaner_v2.03.532
DGMPGDec_v1.4.9
DVD Rebuilder Pro_v1.26.6
DVDDecrypter_v3.5.4.0
DVDFabHDDecrypter_v4.0.3.6beta
DVDIdentifier_v5.0.1
DVDInfoPro_v4.76
DvdReMakePro_v3.6.1
DVDShrink_v3.2.0.15
ExactAudioCopy_v0.99prebeta3
Firefox_v2.0.0.11
FixVTS_v1.603
ImgBurn_v2.3.2.0
ImgToolBurn_v1.2.1
ImgToolClassic_v0.91.7
iTunes_v7.5
LAME_v3.98beta6
MediaCodeSpeedEdit_v1.1.0.13
MediaPlayerClassic_v6.4.9.1
Memtest86_v3.4a
MenuShrink_v2.41
MultiShrink_v1.4
PgcEdit_v8.5
RipIt4Me_v1.7.1.0
Roxio RecordNow Premiere 8
SpybotSearchDestroy_v1.5
Thunderbird_v2.0.0.9
TMPGEnc DVD Author 2
VobBlanker_v2.1.3.0
Winamp_v5.51
WinRAR_v3.71

Oh, and if one program has not worked for you, what do you recommend using instead?

will switch to 64-bit once I get 4gig of ram but currently on a lappy and dont feel like upgrading to 4gig