tigercat wrote:Sprent, Sentinels and Wedge are my favourites
I have done these three, plus The Needles.
Sentinel Range and Sprent were easily the pick of those four for me, but I think that's slightly weather related, as we went up Wedge yesterday and were treated to more or less the same view as Pazzar (with some extra wind and driving rain thrown in, for good measure

).
As a contrast, this was my view from the Sentinels

Got some great weather for the first half of my walk up Sprent, becoming a little cloudier as I got towards the top, but still with fantastic, moody views along the Frankland Range and across Lake Pedder

They are both definitely steep tracks, though personally I found the Sentinels to be the steeper of the two. To give you an idea of what you'll be climbing if you do the Sentinels:

One sticks hard to the right hand side of the prominent bump just to the left of centre there. It's certainly not unmanageable, but it will give your calves a workout! Sprent was definitely steeper at the very start, but I seem to recall it easing off a little more as the walk went on. The other thing worth mentioning about the Sentinels is that there is a little bit of exposure on the final climb along the summit ridge. Nothing that would bother most people, but anybody who is terrified of heights may find it a little uncomfortable. I'm also not sure I'd like to do it in high winds. This shouldn't preclude you from doing the rest of the track though, as there are still fantastic views on offer from the false summit 80% of the way up! (Which is where that shot of my view from the Sentinels came from)
As Pazzar said, The Needles really are quite short. I made it up in around 45 minutes, with a whole lot of foot dragging and "appreciating the view", so I imagine others could make it up quicker than this. I would think 35 -70 minutes would cover the ascent for most people, with an obviously shorter descent. Again, it's steep, but because it's shorter, much more manageable, and still has great views:

In the end, if you have a couple of days, I'd give them all a go, or at least a couple of them if time allows. Mt Sprent has the most "I'm in the Southwest" sort of view for me, with the buttongrass ridge along the Wilmot Range, the jagged quartzite outcrops etc giving you that real SW feeling. The Sentinels are in a great, central location, giving you fantastic view to a multitude of ranges, including those on the shores of Lake Gordon (Thumbs, Clear Hill, Denison Range et al), as well as The Franklands, Western/Eastern Arthurs etc.
One last tip, if you get the chance, go and have a gander from Red Knoll Lookout. You drive right to the top, so no walking required, but on a good day the view is fantastic, as you really are very close to some fairly remote peaks. I spent a couple of days down this way earlier in the week, and had a lot of fun up there taking photos at night:

All in all, hard to go wrong, just pick one and away you go! Hope you get some good weather, and will look forward to the photos!