There are a lot of factors that affect the temps of your viv. The ambient room temps, the ventilation of your viv, how close/far away from the bulb the basking area will be, etc....
I'm not sure anyone would be able to tell you exactly what bulb will work best for you. The easiest thing to do would be start with certain wattage and just change it as needed to get the right temps. That's why using household bulbs works so well because they are pretty cheap and people generally have them laying around anyway.
The ReptiSun 10.0 is an excellent bulb. You want to make sure your beardie can get within 6-8 inches of it when basking though. It doesn't have to extend the entire length of the viv, so the size you have sounds fine.
If you want a great bulb that will provide heat and UVB, the MegaRay MVB is the best you can buy, as Reno said.
I do believe some people have expressed concerns about using them in an enclosed viv because it's hard to keep it AT LEAST 12 inches away from your beardie and depending on the # of vents, it can get too hot.
There are plenty of people that use them though, it's just something to think about.