If you ask Sky nicely enough and/or commit to a lengthy enough contract you can sometimes get discounted or even free SkyQ installation, but its far easier (especially if you're on the older Sky+HD package) to secure a discount which can mean HD can sometimes be thrown in for free.
With regards to the hybrid LNB, I believe its the Sky version you get by default unless you ask the engineer nicely, and feed them enough tea and biscuits (a principle which applies to everything really I find but there we go).
My understanding is that there are probably 4 types of LNB that 'could' be supplied with Sky Q - but I don't know whether Sky installers carry them.
1. Sky Q is compatible with Wideband H/V LNBs (where a pair of LNB cables carry a wide band Horizontal or wide band Vertical feed - with no Hi/Lo switching) These two feeds are all you need to feed as many tuners as you like (previously you would have needed 4 LNB feeds from a regular Quad/Quattro Universal LNB to do this - and Sky wanted to be able to re-use existing 'Sky+' twin cabling so needed a better solution...)
These Wideband LNB feeds are only compatible with Sky Q (and relatively few other receivers - so aren't useful for Freesat were you to stop subscribing to Sky Q and return your receiver. This is very different to the older Sky SD and HD situation where you could swap out a Sky SD/HD box for a Freesat or other FTA box using the same LNB feeds)
2. Sky Q is also, I believe, compatible with Sky's new dSCR protocol (incompatible with the old Sky SCR system) which is based, I think, on JESS/Unicable II - where the LNB shifts tuner-feeds to fixed 'user bands' as requested by the receiver. This is very different to H/V Wideband in how it operates - and has a limit on the number of receivers each dSCR device can feed, but there are multi switches that can detect what type of receiver is connected to each port, allowing Sky Q and Sky HD/SD/Freesat receivers to share the same infrastructure I believe.
LNBs with both 1. and 2. are available with additional, separate legacy, LNB feeds, which can be routed separately and independently to feed older Sky, or non-Sky, receivers.
So you could have a Dual Wideband, Dual Wideband + Legacy, dSCR or dSCR + Legacy LNB (or multi switch) fitted for Sky Q...
it's a bit of a minefield when you get away from standard domestic installations.
Looking to the future - Unicable II is an incredibly powerful standard - as it removes H/V/Hi/Lo from distribution (as it's shifted it to the LNB or multiswitch).
In mainland Europe, where it is far more of a requirement to simultaneously feed multiple satellite positions to residences, Unicable II allows a single LNB feed to carry up to 32 tuner feeds (so 32 DVB-S2 IDTVs, 16 Dual Tuner PVRs, 8 Quad Tuner PVRs etc.), with each tuner able to switch between one of four satellite positions. That's pretty impressive down a single cable. It also allows for receivers to use 'FBC' Full Band Conversion DVB-S2 tuners that take one or two LNB feeds in but can then tune 8+ separate transponders irrespective of their satellite, polarisation or band.
fusionlad, harshy and 2 others