Re: Which 48\" box scraper
</font><font color="blue" class="small">( Hmmmmmm, nope, I would get the 4 foot box blade. My 2410 can struggle at times with a 4 footer. ... I do not believe that you would get full utility from a larger blade on so small a tractor. Yes, you could pull it in places under some conditions and do some work with it but NOT the full range of work that a boxblade is capable of doing when matched with an appropriate tractor. )</font>
While I would tend to agree with TresCows that 48" might be momre appropriate if you want to do some heavy ripping and grading, that's not how I understood your post.
You mentioned maintaining a gravel driveway and "finish grading around a new addition. I've got a NH TC33D with a 6 foot box blade. This is larger than your setup, but the relative difficulty of various boxblade projects should hold up:
Maintaining a gravel driveway is one of the easier things I have done with my box blade. It just does not seem to load things down much (yes, I can manages to slip the wheels when digging in and pulling a large load uphill, that only happens when I'm not paying attention). For me, the choice would be to go wider (54" or 60") for driveway maintenance. Now if you wanted to install a new driveway, that might be different.
The finish grading you mentioned in your post does not sound like heavy duty ripping (maybe I'm misinterpreting what you described). Plus, this is presumably a one-time job. If worse comes to worse, you can always just take shallower bites with the larger blade. If you have more ongoing landscaping duties planned, or they are heavier than what my impression is, then you would be better served by the narrower box blade.
If your main ongoing use of the blade is driveway, I'd go a bit wider than the 48". On the other hand, TresCows is a whole lot more experienced at this than I am so I'd give more weight to his recommendations. I'm interested to hear his response to my comments above (especially gravel drive maint being one of the "easier" boxblade duties) maybe I'm all wet on this, but that's my experience
John Mc