I've been on a four year absence from Magic, and am interested in getting started again. I have a fair amount of decent cards at my disposal (more on that later), and am willing to put in some dough to finish off a solid deck. I'll start by rattling off some ideas as well as what I have at my disposal.
The cards I have -
SUICIDE BLACK - I have a pretty decent start to this, 4x hypnotic specter, 1x phyrexian negator, 1x flesh reaver, 1x nantuko shade, 2x Duress, 4x Hymn to Tourach, 4x Dark Ritual, 2x Unmask, 1x Demonic Tutor, 1x Mind Twist, 1x Strip Mine, 1x Necropotence.
U/R Tinker/Artifact - I played a blue based artifact with some friends after mirrodin came out, but it looks as though it could be relatively powerful with the addition of. Some of the cards I was considering were Darksteel Colossus, 2x Triskelion, Memnarch, 4x Cathodion, Sundering Titan, Duplicant, Sol Ring, Mana Vault, Chalice of the Void, 3x Thirst for Knowledge, Tinker, Fact or Fiction, 4x Brainstorm, 4x Accumulated Knowledge, 3x Mana Leak, 2x Impulse, Lightning Bolt, Wheel of Fortune, 4x Shivan Reef, and Glimmervoid. Goblin Welder would obviously be a must for this deck, however I did not want to purchase 4 copies if I wasn't sure this is the deck I was going to build.
Sliver - I know Sliver will never be a championship caliber Vintage deck, however I have the Sliver Queen, Sliver Overlord, and nearly 4 copies of every sliver from the Tempest Block and the Onslaught block. Any thoughts on 5 color sliver? Or maybe just a 2-3 color sliver splashed with some other good cards? All input is appreciated.
I also have a good white weenie deck, it has Crusade, Glorious Anthem, STP, Savannah Lions, etc. I have a few copies of Wrath of God, and Balance - I would like to put these powerful cards to use if possible.
Any input is good. Feel free to suggest any color scheme. I'm just looking for a pretty decent deck that is fun to play and not necessarily geared to beat any single deck. I primarily just play with friends, and hopefully will find some people to play with when I head off to college next year. Thanks in advance.
Sui Black:

Replace Unmask w/ more duress.
Get 4x Dark Confidants. Necro is only good on turn 0 or 1.
No Twists, please. Consider Misdirecton.
I don't like Negator in my deck, though I agree it's a 4 turn clock. Negator would be good if you have extra food for it, (eg. lands on late game.) otherwise, when a Goblin player cycles an Incinerator on it for 5 damage, you'll lose the negator + 5 other permanents. Play Negator of your meta has alot of control/combo to compensate your speed.
Shades are a must.

Reaver is a no-no.
In an aggro filled environment, Jitte is a god. (watch those lackeys crumple...)
Hyppie is good too. No, he's great.
U/R Tinker:

/

I don't know this deck, but if you want to work w/ DSC and Sundering Titan likes, you should have Workshop. You can't just rely on tinker or your R1 artifact mana producers. The chance of having each of them to your hand is 1:60.
Sliver:

One deck: go to Flash route. You'll need: Flash, Prothean Hulk, 1x Heart Sliver, 4x Virulent Sliver, Some counters such as FoW's and Pact of Negation, usual fixers like Brainstorm.
White Weenie:

Not competitive, but I think for fun, it'll do it's job.
Here's the pieces for you to look at: Thorn of amethyst, Aven Mindscensor, Glowrider, Samurai of the Pale Curtain, True Believer.
Note: No Crusades or Glorious Anthems.
Your beater? Exalted Angel.
Your manabase? Plains + Ancient Tomb