The Blonder Tongue amp does NOT pass the return signal, but it does have a lot more gain than does the Sonora amp, and a higher maximum output level.
If you want to use the Blonder Tongue amp, you can use two STD-9501 NAS diplexers to loop the return signal around it, but you might still be overloading it.
Roughly speaking, the SWM LNB has an output signal level of -31dBm with 15 dB of AGC to keep it relatively stable eve3n during rain fade. A well designed system delivers at least -55 dBm to each receiver. You lose around 12dB through the eight way splitter, and then you have your cable losses to factor in.
The LDA-50 has a gain adjustment of 37 to 52 dB at 2GHz, and a maximum output of 1dBm, so even if you put it at the bottom of a 200' RG11 trunkline, you will need to turn the amplifier gain all the way down and you still might wind up overdriving the receivers, since they probably will not perform reliably if their input is stronger than about -20dBm. Basically, the Blonder Tongue has so much gain that it presents an engineering challenge for you that may be too much of a nuisance for you to deal with. If it were mine, I'd put it at the bottom of the trunline, loop the sub band return signal around it, and put a 10dB pad on the input and another 10 dB pad on the output.
The Sonora amp only had about 14dB of gain and a maximum output level of about -14dBm. You can probably drop it in anywhere. If it were mine, I'd put it at the bottom of the trunkline rather than at the top, but before you buy one, do the loss arithmetic for your RG11 trunkline at 1,800 MHz, plus the published splitter loss, plus the RG-6 drop line loss to make sure you are still above -55 dBm at each receiver. If you are not, then you may need to use two of them: one at the rooftop and one near the splitter.