I was in Prague about 8 years ago - we stayed here:
Home | Questenberg Boutique Hotel I
t was excellent; quiet, comfortable and within walking distance of all the ‘must sees’
If you have Amex Platinum, you can book up to $1000 value of rooms at Waldorf Astoria Versailles (equivalent to about f3-4 nights depending on dates), and receive back $500 - offer ends December 31.
Also, be aware Paris has a serious bedbug infestation…