There is not a $25/month fee. The Genie incurs the same DVR fee you have with your HR24. Assuming you activate the whole-house option (Genie access on all TV's) there is an additional $3/month fee plus the additional receiver fee for each TV.
Here's my bill.
11/05 12/04 CHOICE - no locals Monthly 61.99
11/05 12/04 Advanced Receiver-HD Monthly 10.00
11/05 12/04 Advanced Receiver-DVR Monthly 10.00
11/05 12/04 DIRECTV Whole-Home DVR Service Monthly 3.00
11/05 12/04 Network Package Monthly (DNS) 20.00
11/06 Additional TV 6.00