I just got a pair of 45 mono blocks and am pleasantly surprised with how they compare to my 300b amps. To my ears, my 45 set amps can play subjectively louder than my 300b's with less distortion. I often don't realize how loud the volume is when I am listening. Maybe the first watt is better?
All that aside, impedance is just as important as high sensitivity in matching set amps with speakers. The 8 ohm rating of your Omega speakers would be good for a 45 set amp if it is a flat 8 ohms with no major dips. A sensitivity of 94.5 db, while not ideal, would work okay too if that is truly the sensitivity of the speakers. Actual sensitivity measurements are usually lower than what the manufacturer provides (see, for example, the recent Stereophile review of the Volti Razz speakers). The bottom line is that I would try to get some real world speaker measurements before proceeding, as your speakers are perhaps on the cusp of what would and would not work with a flea watt amp.
All that aside, impedance is just as important as high sensitivity in matching set amps with speakers. The 8 ohm rating of your Omega speakers would be good for a 45 set amp if it is a flat 8 ohms with no major dips. A sensitivity of 94.5 db, while not ideal, would work okay too if that is truly the sensitivity of the speakers. Actual sensitivity measurements are usually lower than what the manufacturer provides (see, for example, the recent Stereophile review of the Volti Razz speakers). The bottom line is that I would try to get some real world speaker measurements before proceeding, as your speakers are perhaps on the cusp of what would and would not work with a flea watt amp.