External hardware reverb
I just want to give a shout out to traditional external hardware reverbs. I think they're highly underrated by many in this convolving day and age, at least by orchestra users. Sure, if you write symphonic or chamber music and want your tracks to sound exactly like they were being played at Amsterdam's Concertgebouw or Vienna's Musikverein then convolution is the way to go.
But convolution can actually be a dead end for cinematic tracks. Most film scores are recorded fairly dry on recording stages, usually with multiple close microphones that are balanced in the mix -- unlike the lonely stereo pair in a concert hall that use the orchestras natural balance. The recording stage provide early reflections but the reverb tail is added in the mix by a reverb. Lexicon 960L (and it's predecessor 480L) is pretty much the standard for film scoring and mixing.
So there isn't anything inherently wrong about using external reverbs like Lexicon PCM91/PCM90 or T.C. Electronics M-One/M-OneXL if you can afford them or a budget reverb of good quality for your sample based orchestra music. That's why it's a good idea to have a low-latency audio interface with more in/out ports than a single stereo pair so that you can hook it up as an external send effect. (Most quality reverbs and effect processor have S/PDIF that you can use to interface with them.)
Of course, if you really want to get the sound of a 960L there's always IRs of it to buy (e.g. from Samplicity) but then you loose the big benefit of using the hardware equivalent: editing the reverb settings.
That's why I have dusted of and begun using my old budget hardware reverb again.
I also want to share a mixing technique that I picked up from the VSL SE tutorial videos. If the instrument signals you receive from LinuxSampler are already well balanced in terms of gain level: Insert a pre-fader send to the reverb, the fader can then be used to position the instrument depth wise. At 0dB it will practically be in your face (or at least in your lap) while being distant at -10dB and even more so at -20dB ...well you get the idea.
Another good idea is to pan the instruments (if they aren't already correctly positioned) using the MIDI pan setting in your sequencer so that LinuxSampler will pan the instrument signal for you.
Ardour2, Qtractor, Linuxsampler, M-AUDIO Delta 1010, Axiom 61, Korg D12, AKAI S2000, E-MU Proteus 2k, Roland R-5, Roland HP 1300e, Zoom RFX-1000, 4GB RAM x86_64 Intel Pentium Dual 1.80GHz Gentoo Linux