Fighting Deskchair Tushitis or Truck Driver's Tush

If you're a writer or work in any office job, the chances are you have some serious deskchair-itis.  And if you're a truck driver you likely suffer from similar symptoms.  You know what it is.  That feeling when you've been sitting too long.  Working too long.  And haven't had enough breaks?  Yep, been there, done that. 

I'm a writer, not a truck driver, so I can't testify to the efficacy of this for a truck driver. But I've tried a variety of desk chairs and have never found an answer to decrease my seat discomfort.  Yes, getting up and walking around helps but... not quite enough.

Then yesterday I got an email.  From Hammacher Schlemmer.  You know the folks.  They have great gadgets you don't really need but want anyway? Or some that you need but can't afford?  It's a great go to site when you're stuck for guy gift at Christmas time.  But today, today they've may have provided me (and millions of others) with the answer to recurring deskchair-itis or trucker tush. 

They sent me an advertisement for their "Truck Driver's Pressure Reliever Cushion."  Ah! Relief! I am all set to order this great sounding product (despite it's nearly $100 price tag) when I spot another product, "The Portable Gel Seat." 

Now I'm in a quandary.  What should I buy?  The gel seat costs less but does this mean it will be less effective?  The pressure reliever cushion actually shows the product being used on a desk chair... so I'm vacillating back and forth.  Which one will work best?

The cost isn't what's stopping me (although I'm a relatively poor writer, so it is a consideration.)  But I sit in a desk chair 10-12 hours a day.  My backside is ... crushed! (not to mention spreading!) Unfortunately neither of these products will prevent over 40 spread! But my desk chair is crying out for a cushion!  So tell me, which do you think I should buy?  I need advice!  All suggestions welcome.  Truckers, office workers or anyone else who spends a lot of time on their tush on a daily basis--weigh in with your opinions!