Is 11' distance from projector screen too close?

I have a 11.5 viewing distance with my Sony H10 which uses a special sony 'short throw' lens. Front venting. The screen it self is 108". It has little 'screen door' artifacts. I also have a '20' model but it is a back up for when the '10' goes down, which has not happened yet. The projector is ceiling mounted. While this technology is about ten years old, it still is okay. With the short distance I am not aware of any current 1080 units that are available. Let me know if you find one.

Wow short throw usually means less then that often times.
I bought a Sony VPL100 with less than 200 hours on original bulb for $750 and I couldnt pass it up for 1080p.
Between Sony Panasonic, Epson and Mitsubishi I see no reaosn to look at the Runco type overpriced models.
I once saw a short throw that could do 100in from around 2 ft away, crazy.

I want to thank everyone for their time and response.

I have an opportunity to purchase a new, in the box, Sony VPL-HW15 for about a grand less than anywhere I can find it on the net.

Just seriously concerned about the short distance and whether or not to pull the plug on the projector idea and go with my original idea, which was the LG Infinia 60PK950 Plasma.

Sedona take a look at this for that model
http://www.projectorcentral.com/Sony-BRAVIA_VPL-HW15-projection-calculator-pro.htm

From everything you can see on this link it will work perfectly, it is well within its sweetspot of throw range.
Thanks for including your model as it made it easy to see this will work fantastic. You can go almost 1.5ft closer and still throw that screen size.

And oh yeah PULL THE TRIGGER! Nobody ever says "I wish I had gone with the smaller Plasma" and once you experience the large image thrill for movies, sports, games, concerts or whatever your into you will have a big ole smile on your face thankful you went Projection!
That Sony is a sweet performer, has both vertical and horizontal manual lense shift and can throw from 6 to 30ft, at 1000 lumens its not gonna be ideal for the long throw ratios listed as it will lose some punch but keeping it on the close end will allow some low level to moderate lights to be on during viewing. Yuo will love this unit.