Your gonna love the Vic. I came from the same bike as you only a 2007. Even had the V&H on it. Great bike but I wanted more and I found it in Victory.
I'm ordering a Lloydz filter, Fuel Controller, 1/4 turn throttle ring very soon. The 1/4 turn ring is a great addition for $20. It makes the turn from zero to full throttle 1/4 of a turn instead of 1/3, which 1/4 is what your VTX was. Vic turn will seem a bit longer without this.
And I'm with Crossroads here. D&D's are great and if you want something a little less than the V&H pipes you had definately consider these.
Seat your thinking of...well I would wait and see as well. These are better than the Honda was stock for sure. You still may want one but give the stock Vic one a chance first.
Great Choice of bike now go enjoy it!!!
2013 AntiFreeze Green
D&D exhaust, Gust. Smoke +2 Flip or 7" Dk Smoke shield, Kickers with Rockford Fosgate Amp, Vic Pass. Backrest & lots of extra chrome.
2011 Victory Blue XC - Traded
2007 Honda Blue VTX - Traded